div#login {
	$formHeight: 10em;
	$formWidth: 10em;
	position: absolute;
	top: calc(50% - #{$formHeight/2});
	left: calc(50% - #{$formWidth/2});
	margin: 0 auto;
	width: $formWidth;
	strong {
		position: relative;
		left: -1em;
		bottom: 0.5em;
	}
	button {
		position: absolute;
		right: -0.5em;
		bottom: -3.5em;
		margin: 1em auto;
	}
}